Safety-envelop.



H. BOSSART.

SAFETY ENVELOP- APPucATloN msn FEB. 16. 191s.

1,209,109. y Ptented De@.19,1916.

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SAFETY-ENVELOP.

Specification of Letters Patent.

Application filed February 16, 1916. i Serial No. 78,375. l

To all whom t may concern.' Be it known that 1HANS vBossAR'r, a citizenof the United States, residing at Span Francisco, in the county of SanFrancisco and State of California, have invented certain new and usefulImprovements in'Safety- Envelops, of which the following is aspecication. f

This invention -relates to an improved safety envelop and the principalobject of the invention is to provide an envelop which is so constructedthat it may be folded and securely held in the folded condition withoutthe necessity of applying glue or any other adhesive, an improved typeof button and socket being provided for releasably holdingthe envelop inthe closed position.

Another object of the invention is to so construct this envelop that thebutton and socket will be concealed when the envelop is folded thuspreventing the opening of thel envelop without tearing the envelop.

This invention is illustrated in the accompanying drawings, whereinFigure 1 is a view of the blank from which the envelop is formed. Fig. 2is a view showing the envelop partially folded and ready to have theletter inserted. Fig. 3 is a'view showing the envelop further folded andready for closing and sealing. Fig. 4 is a fragmentary sectional viewshowing the manner of folding the envelop in the closed position.

The blank 10 is provided with side portions 11 and 12 and upper andlower portions 13 and 14 which form the side or end flaps and upper andlower Haps of an envelop when the blank is folded as shown in Figs.2`and 3Q This blank will be folded along the dotted lines 15 and 16 toform the Side flaps 11 and 12 and will be folded along the dotted lines17 and 18 to form the upper and lower flaps. After the side flaps 11 and12 have been folded with the side flap A11 resting upon side flap 12,the upper and lower iaps will be folded along the dotted lines 19 and 20thus providing side extensions 21 and 22 folded one upon the other andreinforcing the upper and lower `flaps of the envelop.

After the envelop has been folded as Shown in Fig. 2, the letter will beplaced in the envelop and this envelop will then be folded as shown inFig. 3. Upon the side or end Hap 12 there is located a socket 23 `andupon the upper flap 13 there is located fastener 24k formed from sheetlmetal stamped to provide prongs orsnap l,hoolirs 25 which prongs arebent to extend as Shown yin Fig. 4. It should `be noted that the platesfrom which the socket 23 and fastener 24 are formed are curvedtransversely and Patented Dec. 1:9,-19161 sev therefore a very securefastener will be prol vided when the resilientV prongs l25 are forcedthrough the opening 26 of the socket 23. When foldedas shown in. Figs.v2 and 3, the flap-11 will be first folded upon'the flap 12 with itsopening 27 registering with the opening 26 and the lower flap will thenbe. folded upon the flap llpwith its opening 28 registering with ktheopening 27. The letter will then be putin place and after the' sideextensions 21 are folded as Shown in Fig. 3 with the prongs 25 passingthrough the opening 29, the upper' flap 'will 'be folded downY upon `thelower flap 14 and the prongs forced through vthe yregistering openingsof the end and lower flaps and through the opening 26 of the socketpiece 23. The fastening device will now be entirely covered andpositioned within the envelop where it cannot vbe reached withouttearing the envelop. Therefore the envelop cannot be opened without thefact being indicated by the tear. y

A very simple device has therefore'been provided ,for securely' holdingthe Venvelop closed and preventing it from being opened by unauthorizedpersons without the fact being indicated, when the proper person`obtains possession of the envelop.'

What is claimed is l An envelop comprising a body portion, end flaps,upper and lower iiaps having side extensions forming webs connecting theupper and lower flaps with the end flaps, a Socket plate fitting againstthe inner face of one of said end iiaps and provided with an opening,the second end flap being provided with an opening for registering withthe opening in the socket plate when the second flap is folded upon thelirst mentioned flap,

ings through which said resilient prongs pass, the side extensions ofthe lower flap being provided with openings registering with an openingin the lower ap, said lowerl ap being folded upon said end flaps withits registering` openings registering with the openings in the socketplate, and said upper flap being folded upon'said lower flap with theprongs extending through the register- Y v HANS BOSSART. Witnesses:

GR'. MA. VELLE, CH. DEE SONGH.

`(lopies of thisvpteiit'may be obtained for ve cents each, byaddress'ngvthe' Commissioner of Patents,

' Washington; D. C.

